Improvement in producing continuous circular from reciprocating rectilinear motion



UNITED STATES PATENT OFFICE.

CHARLES S. HARRIS, OF I-IOLYOKE, MASSACHUSETTS.

Specification forming part of Letters Patent N o. 11,123, dated June 20, A1854.

lletters, and references thereof.

The said drawings exhibit Iny invention as applied to The shaft of a hand-drill, the stock or handle of which is to be held in one hand of a person while the mechanism for rotating the drill mandrel or shaft is operated by the other hand of the holder.

Figure. l is a top View, and Fig. 2 is a side elevation, of the said drill-stock and the said mechanism for operating it.

In the said drawings, A denotes the drill mandrel or shaft, which is extended from and made to freely rotate iu a handle B. On this shaft or mandrel a double grooved pulley C is fixed so as to turn with the shaft. Extendingcver this pulley is a long rod D, which is bent at its two ends, as seen at a and c in Fig. 2, th'e latter part c being provided with a series of holes d d d made through it. A lever G, jointed at its upper end to a handle I, is connected to the part c of the rod I) by means of a pin or fulcruln Il, the rod being made to extend through the lever and the lever to turn or vibrate freely on the pin. Attached to one arm of the lever G is a draw cord or band E, that is continued to the top surface of one of the grooves of the pulley C and wound once around said pulley and eX- tended therefrom and fastened to the upper `part of the bent portion or arm a of the rod D. Another chain, cord, or band F has one end attached to the other or lower arm of the lever G, and is from thence continued to the under side of the other groove of the pulley C, and thence wound around the said pulley and continued and fastened to the lower end of the arm a, .the whole being substantially as seen in Figs. l and 2, in the latter of which the pulley C is denoted by dotted lines. The length of each cord is to be such that when the lever G is turned on its fulcrum in either direction it shall draw one of the cords tight and loosen the other oord. Now if, while the handle B is grasped in the left hand of a person, the handle I is taken by him in his right hand and he moves it and the rod D forward and backward in longitudinal directions or With a reciprocating rectilinear Inotion, he will produce a continued circular rotation or Inotion of the drill-shaft, each of the Acords E F being alternately drawn upon and loosened by the peculiar action of the lever G induced by the pressure and draft of the handle I.

I would remark that I am aware that racks and pinions have been combined so as to produce a continuous rotary motion from a reciprocating rectilinear one.

I do not claim a rack and pinion or the duplication of the same, or a combination of two racks and pinions, or two racks anda selni-pinion so applied as to produce circular motion from a rectilinear motion. Nor do I claim the combination of a bow and string or band With a pulley for obtaining a circularmotion from a rectilinear motion nor the mere duplication of such devices; but

That I do claim is- The so combining with the bow or bar I) and the two bands E F and the handle I (or its equivalent) a vibratory or rocker lever G that during the reciprocating rectilinear movements of the bar or bow D caused by the .power applied to such rocker-lever it shall be made to operate so as to alternately tighten and loosen each cord upon the pulleys of the drill-stock, as specified, and so as to cause the drill-stock to be rotated, as described.

In testimony whereof I have hereto set my signature this 5th day of October, A. D. 1853.

CHARLES S. HARRIS.

Witnesses:

R. H. EDDY, F. P. HALE, Jr. 

